Kantian philosophy in the context of "Critique of Pure Reason"

In Kantian philosophy, the thing-in-itself (German: Ding an sich) is the status of objects as they are, independent of representation and observation. The concept of the thing-in-itself was introduced by the German philosopher Immanuel Kant, and over the following centuries was met with controversy among later philosophers. It is closely related to Kant's concept of noumena or the objects of inquiry, as opposed to phenomena, its manifestations.

A Theory of Justice is a 1971 work of political philosophy and ethics by the philosopher John Rawls (1921–2002) in which the author attempts to provide a moral theory alternative to utilitarianism and that addresses the problem of distributive justice (the socially just distribution of goods in a society).The theory uses an updated form of Kantian philosophy and a variant form of conventional social contract theory. Rawls's theory of justice is fully a political theory of justice as opposed to other forms of justice discussed in other disciplines and contexts.

The resultant theory was challenged and refined several times in the decades following its original publication in 1971. A significant reappraisal was published in the 1985 essay "Justice as Fairness" and the 2001 book Justice as Fairness: A Restatement in which Rawls further developed his two central principles for his discussion of justice. Together, they assert that society should be structured to provide the greatest possible degree of liberty to its members, limited only by the principle that one individual's liberty must not infringe upon the liberty of others. Secondly, inequalities – either social or economic – are only to be allowed if the worst off will be better off than they might be under an equal distribution. Finally, if an inequality is to be justified on the grounds of its benefits, it must not create additional barriers for those without resources to access positions of power, such as public office.